* common example: ​ 2 12v, 90Ah batteries in parallel = a 12v, 180Ah battery bank. This is not a recommended configuration. ​ It is not due to any shortcoming of parallel connections; ​ [[electrical:​12v:​deep_cycle_battery#​chain_store_batteries|12v "deep cycle" or marine batteries]] are rarely real deep cycle batteries. ​

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* common example: ​ 2 12v, 90Ah batteries in parallel = a 12v, 180Ah battery bank. This is not a recommended configuration. ​ It is not due to any shortcoming of parallel connections; ​ [[electrical:​12v:​deep_cycle_battery#​chain_store_batteries|12v "deep cycle" or marine batteries]] are rarely real deep cycle batteries ​and suffer from the treatment van life dishes out.